:root {
    --primary-bg: #f5f3ff;
    --card-bg: #ffffff;
    --text-main: #1a0a2e;
    --text-muted: #6b5b95;
    --accent-color: #5d1ac7; 
    --accent-light: #f3efff; 
    --accent-border: #d2c6ed;
    --white: #ffffff;
    --header-gradient: linear-gradient(135deg, #43119f 0%, #5d1ac7 60%, #874bed 100%);
    --month-active-bg: linear-gradient(135deg, #5d1ac7, #7227dd);
}

body.dark {
    --primary-bg: #0f0a17;
    --card-bg: #171221;
    --text-main: #f0eeff;
    --text-muted: #a89ec9;
    --accent-color: #7227dd;
    --accent-light: #221a36;
    --accent-border: #3b2c5e;
    --header-gradient: linear-gradient(135deg, #18053a 0%, #300d75 100%);
    --month-active-bg: linear-gradient(135deg, #5d1ac7, #7227dd);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

body {
    background-color: var(--primary-bg);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
    position: relative;
}

.header-fs {
    width: 100%;
    background: var(--header-gradient);
    box-shadow: 0 4px 24px rgba(124,58,237,0.4);
    position: relative;
    z-index: 100;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.logo {
    font-size: clamp(20px, 5vw, 28px);
    color: #fff;
    letter-spacing: -0.5px;
}

.logo-bold {
    font-weight: 800;
}

.logo-light {
    font-weight: 600;
    color: #a78bfa; /* Toqroq (darker) rang compared to white */
}

.nav-controls {
    display: flex;
    gap: 6px;
    align-items: center;
}

.nav-controls button {
    background: rgba(255, 255, 255, 0.18);
    border: none;
    color: #fff;
    font-weight: 700;
    font-size: 11px;
    text-transform: uppercase;
    cursor: pointer;
    border-radius: 20px;
    padding: 5px 11px;
    transition: all 0.2s ease;
    letter-spacing: 0.5px;
}

.nav-controls button.active {
    background: rgba(255,255,255,0.95);
    color: var(--accent-color);
}

.theme-toggle {
    width: 36px !important;
    height: 36px !important;
    padding: 0 !important;
    font-size: 17px !important;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50% !important;
}

.main-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 28px 16px 48px;
    width: 100%;
}

.calculator-card {
    background: rgba(255, 255, 255, 0.75);
    width: 100%;
    max-width: 600px;
    border-radius: 28px;
    padding: clamp(24px, 5vw, 44px);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    gap: 24px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

body.dark .calculator-card {
    background: rgba(30, 26, 40, 0.65);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.4), 0 1px 3px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 4px;
}

.input-group label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.select-wrapper, .input-wrapper {
    position: relative;
    width: 100%;
}

select, input[type="number"] {
    width: 100%;
    padding: 14px 48px 14px 18px;
    background-color: var(--accent-light);
    border: 1px solid var(--accent-border);
    border-radius: 14px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-main);
    outline: none;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    appearance: none;
    -webkit-appearance: none;
}

select:focus, input[type="number"]:focus {
    border-color: var(--accent-color);
    background-color: var(--card-bg);
    box-shadow: 0 0 0 4px rgba(93, 26, 199, 0.15), inset 0 2px 4px rgba(0, 0, 0, 0.01);
}

select {
    cursor: pointer;
    padding-right: 16px;
}

.select-wrapper::after {
    content: '▾';
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-color);
    pointer-events: none;
    font-size: 13px;
}

.currency-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-color);
    font-weight: 800;
    font-size: 17px;
}

.month-selection {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-top: 4px;
}

.month-btn {
    background-color: var(--accent-light);
    border: 1px solid var(--accent-border);
    border-radius: 14px;
    padding: 14px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    color: var(--text-main);
    line-height: 1;
    box-shadow: 0 2px 6px rgba(0,0,0,0.02);
}

.month-btn:hover {
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(93, 26, 199, 0.08);
    transform: translateY(-2px);
}

.month-btn.active {
    background: var(--month-active-bg);
    border-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 8px 24px rgba(93, 26, 199, 0.35);
    transform: translateY(-2px) scale(1.02);
}

.month-num {
    font-size: 18px;
    font-weight: 800;
}

.month-txt {
    font-size: 10px;
    font-weight: 500;
    opacity: 0.75;
    margin-top: 3px;
}

.helper-text {
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 18px;
}

.result-display {
    background: linear-gradient(135deg, #e8e0fc 0%, #d8ccf8 100%);
    border: 2px solid #b7a0f4;
    border-radius: 18px;
    padding: 26px 20px;
    text-align: center;
    margin-top: 24px;
}

body.dark .result-display {
    background: linear-gradient(135deg, #241154 0%, #18093b 100%);
    border-color: #4a21a5;
}

.result-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

body.dark .result-label {
    color: #b7a0f4;
}

.result-amount {
    font-size: clamp(38px, 11vw, 56px);
    font-weight: 900;
    color: var(--accent-color);
    line-height: 1.1;
    letter-spacing: -1.5px;
    margin-bottom: 8px;
}

.result-amount span {
    font-size: 0.5em;
    font-weight: 700;
    margin-left: 4px;
}

body.dark .result-amount {
    color: #e8e0fc;
}

.result-meta {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
}

body.dark .result-meta {
    color: #a89ec9;
}

.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 13px;
}

/* Responsive improvements */
@media (max-width: 480px) {
    .month-selection {
        gap: 8px;
    }
    
    .month-btn {
        padding: 10px 0;
    }
}